Question: Who became the head of the government of Vaduz on 2017-1-0?
Paraphrase: Name the person who took over as  the head of the government of Vaduz on 2017-1-0.
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q1844 p:P6 ?s . ?s ps:P6 ?obj . ?s pq:P580 ?x filter(contains(YEAR(?x),'2007')) }